👉 Crinitina, also known as crinoids, is a group of marine animals characterized by their exoskeletons made up mostly of calcium carbonate and other minerals. They are primarily found in the oceanic floor, including the deep sea, where they can survive for hundreds of thousands of years without decomposing. Crinitinas are known for their unique structure, which allows them to support complex structures, including shells, skeletons, and even organs.
